mirror of
https://github.com/klokantech/tileserver-php.git
synced 2025-08-06 22:56:31 +02:00
The initial commit for 0.1pre.
This commit is contained in:
Petr Pridal
408
tileserver.php
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408
tileserver.php
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<?php
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/*
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* TileServer.php project
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* ======================
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* https://github.com/klokantech/tileserver-php/
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* Copyright (C) 2012 - Klokan Technologies GmbH
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*/
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# Set you own config values here:
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$config = array(
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"baseUrls" => array("http://10.0.1.11/"),
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"serverTitle" => "TileServer.php v0.1",
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);
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# PHP debugging
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ini_set("error_reporting", "true");
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error_reporting(E_ALL|E_STRCT);
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# Global variable + ccepted GET / POST variables from the outside world
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$baseUrl = $config['baseUrls'][0];
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// TODO: We can detext the baseUrl as well - for defined requests
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$service = (array_key_exists('service', $_GET)) ? $_GET['service'] : "";
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$layer = (array_key_exists('layer', $_GET)) ? $_GET['layer'] : "";
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$callback = (array_key_exists('callback', $_GET)) ? $_GET['callback'] : "";
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# ------------
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# TEST SERVICE
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# ------------
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if ($service == 'test') {
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header("Content-Type: text/plain; charset=utf-8");
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echo "TileServer.php (", $config['serverTitle'], ') at ', $baseUrl;
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die();
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}
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# ------------
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# HTML SERVICE
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# ------------
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if ($service == 'html'):
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$maps = maps();
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?>
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<!doctype html>
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<html>
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<head>
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<meta charset="utf-8"/>
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<title><?php echo $config['serverTitle'] ?></title>
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<html>
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<h1>Welcome to <?php echo $config['serverTitle'] ?></h1>
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<p>
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This server distributes maps to desktop, web, and mobile applications.
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</p>
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<p>
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The mapping data are available as OpenGIS Web Map Tiling Service (OGC WMTS), OSGEO Tile Map Service (TMS), and popular XYZ urls described with TileJSON metadata.
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</p>
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<?php
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# Test if the config value for baseUrls is set correctly
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if ((strpos($baseUrl, $_SERVER['HTTP_HOST']) === false) or ($baseUrl[strlen($baseUrl)-1] !== '/')) {
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// TODO: Make a test with ?service=test and suggest the value - or is there any way how to get URL for actual directory with mod_rewrite in use ?
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?>
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<h3 style="color:darkred;">Wrong configuration of the "BaseURL" in tileserver.php</h3>
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<p style="color:darkred; font-style: italic;">
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Please modify 'tileserver.php' file and replace the '<?php echo $baseUrl ?>' in the $config variable with '<?php echo selfUrl(); ?>' (with slash in the end) or other correct address to your server. Multiple CNAME can be used for better performance - more in <a href="readme.md">readme.txt</a>.
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</p>
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<?php }
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# Are there some maps on the server?
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if (count($maps) == 0) { ?>
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<h3 style="color:darkred;">No maps available yet</h3>
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<p style="color:darkred; font-style: italic;">
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Ready to go - just upload some maps into directory: <?php echo getcwd(); ?>/ on this server.
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</p>
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<p>
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Note: The maps can be a directory with tiles in XYZ format with metadata.json file.<br/>
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You can easily convert existing geodata (GeoTIFF, ECW, MrSID, etc) to this tile structure with <a href="http://www.maptiler.com">MapTiler Cluster</a> or open-source projects such as <a href="http://www.klokan.cz/projects/gdal2tiles/">GDAL2Tiles</a> or <a href="http://www.maptiler.org/">MapTiler</a> or simply upload any maps in MBTiles format made by <a href="http://www.tilemill.com/">TileMill</a>. Helpful is also the <a href="https://github.com/mapbox/mbutil">mbutil</a> tool. Serving directly from .mbtiles files is supported, but with decreased performance.
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</p>
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<?php
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# Print the available maps
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} else {
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// print_r($maps);
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echo "<h3>Available maps</h3>";
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echo "<ul>";
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foreach ($maps as $map) {
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// echo "<li><a href=\"".str_replace('.mbtiles', '', $map['basename'])."\">".$map['name']."</a>" ;
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echo "<li>".$map['name'];
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}
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echo "</ul>";
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}
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?>
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</body>
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</html>
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<?php
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die;
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endif;
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# ------------
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# JSON SERVICE
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# ------------
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if ($service == 'json'):
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header("Content-Type:application/json; charset=utf-8");
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if ($layer) {
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$output = metadataTileJson(layer($layer));
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} else {
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$maps = maps();
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$tilejsons = array();
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foreach ($maps as $map)
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$tilejsons[] = metadataTileJson($map);
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$output = $tilejsons;
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}
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$output = json_encode($output);
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$output = str_replace("\\/","/",$output);
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if ($callback) echo "$callback($output);";
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else echo $output;
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die;
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endif;
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# INTERNAL FUNCTIONS:
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function maps() {
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$maps = array();
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# Scan all directories with metadata.json
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foreach (glob('*/metadata.json') as $mj) $maps[] = metadataFromMetadataJson($mj);
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# Scan all mbtiles
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foreach (glob('*.mbtiles') as $mbt) $maps[] = metadataFromMbtiles($mbt);
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return $maps;
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}
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function layer( $layer ) {
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if (strpos($layer, '.mbtiles') === false)
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return metadataFromMetadataJson($layer.'/metadata.json');
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else
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return metadataFromMbtiles($layer);
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}
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function metadataFromMetadataJson( $jsonFileName ) {
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$metadata = json_decode( file_get_contents($jsonFileName), true );
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$metadata = metadataValidation($metadata);
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$metadata['basename'] = str_replace('/metadata.json', '', $jsonFileName);
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return $metadata;
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}
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function metadataFromMbtiles( $mbt ) {
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$metadata = array();
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$db = new PDO('sqlite:'.$mbt,'','',array(PDO::ATTR_PERSISTENT => true));
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if (isset($db)) {
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$result = $db->query('select * from metadata');
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$resultdata = $result->fetchAll();
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foreach ($resultdata as $r) {
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$metadata[$r['name']] = $r['value'];
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}
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$metadata = metadataValidation($metadata);
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$metadata['basename'] = $mbt;
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}
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return $metadata;
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}
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function metadataValidation( $metadata ) {
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if (array_key_exists('bounds', $metadata )) {
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// TODO: Calculate bounds from tiles if bounds is missing - with GlobalMercator
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$metadata['bounds'] = array_map( 'floatval', explode(',', $metadata['bounds'] ));
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}
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if (!array_key_exists('profile', $metadata )) {
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$metadata['profile'] = 'mercator';
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}
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// TODO: detect format, minzoom, maxzoom, thumb
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// scandir() for directory / SQL for mbtiles
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if (array_key_exists('minzoom', $metadata ))
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$metadata['minzoom'] = intval( $metadata['minzoom'] );
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else
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$metadata['minzoom'] = 0;
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if (array_key_exists('maxzoom', $metadata ))
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$metadata['maxzoom'] = intval( $metadata['maxzoom'] );
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else
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$metadata['maxzoom'] = 18;
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if (!array_key_exists('format', $metadata )) {
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$metadata['format'] = 'png';
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}
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/*
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if (!array_key_exists('thumb', $metadata )) {
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$metadata['profile'] = 'mercator';
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}
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*/
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return $metadata;
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}
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function metadataTileJson( $metadata ) {
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global $config;
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$metadata['tilejson'] = '2.0.0';
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$metadata['sheme'] = 'xyz';
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$tiles = array();
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foreach($config['baseUrls'] as $url)
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$tiles[] = $url.str_replace('.mbtiles', '', $metadata['basename']).'/{z}/{x}/{y}.'.$metadata['format'];
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#print_r($tiles);
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$metadata['tiles'] = $tiles;
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return $metadata;
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}
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function selfUrl( $serverOnly = false ) {
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if(!isset($_SERVER['REQUEST_URI'])){
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$serverrequri = $_SERVER['PHP_SELF'];
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}else{
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$serverrequri = $_SERVER['REQUEST_URI'];
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}
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$s = empty($_SERVER["HTTPS"]) ? '' : ($_SERVER["HTTPS"] == "on") ? "s" : "";
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$port = ($_SERVER["SERVER_PORT"] == "80") ? "" : (":".$_SERVER["SERVER_PORT"]);
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if ($serverOnly) return 'http'.$s.'://'.$_SERVER['SERVER_NAME'].$port."/";
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return 'http'.$s.'://'.$_SERVER['SERVER_NAME'].$port.$serverrequri;
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}
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function doConditionalGet($timestamp) {
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$last_modified = gmdate('D, d M Y H:i:s \G\M\T', $timestamp);
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$etag = '"'.md5($last_modified).'"';
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// Send the headers
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header("Last-Modified: $last_modified");
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header("ETag: $etag");
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// See if the client has provided the required headers
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$if_modified_since = isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ?
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stripslashes($_SERVER['HTTP_IF_MODIFIED_SINCE']) :
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false;
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$if_none_match = isset($_SERVER['HTTP_IF_NONE_MATCH']) ?
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stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) :
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false;
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if (!$if_modified_since && !$if_none_match) {
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return;
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}
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// At least one of the headers is there - check them
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if ($if_none_match && $if_none_match != $etag) {
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return; // etag is there but doesn't match
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}
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if ($if_modified_since && $if_modified_since != $last_modified) {
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return; // if-modified-since is there but doesn't match
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}
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// Nothing has changed since their last request - serve a 304 and exit
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header('HTTP/1.0 304 Not Modified');
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exit;
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}
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/*
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TODO: https://github.com/klokantech/tileserver-php/issues/2
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function geoToMercTile($lon, $lat, $zoom) {
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$xtile = floor((($lon + 180) / 360) * pow(2, $zoom));
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$ytile = floor((1 - log(tan(deg2rad($lat)) + 1 / cos(deg2rad($lat))) / pi()) /2 * pow(2, $zoom));
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return array($xtile, $ytile);
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}
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function geoToGeoTile($lon, $lat, $zoom) {
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$res = 180 / 256.0 / pow(2, $zoom);
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$xtile = floor( ceil( (180 + $lat) / $res / 256.0 ) - 1 );
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$ytile = floor( ceil( (90 + $lon) / $res / 256.0 ) - 1 );
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return array($xtile, $ytile);
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}
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function tileRange($bounds, $minzoom, $maxzoom) {
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for ($z=$minzoom; $z < $maxzoom+1; $z++) {
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print "$z\n";
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list($minx, $miny) = geoToMercTile($bounds[0], $bounds[1], $z);
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list($maxx, $maxy) = geoToMercTile($bounds[2], $bounds[3], $z);
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print_r( array($minx, $miny, $maxx, $maxy) );
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}
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}
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// Better use the port of Klokans' GlobalMapTiles:
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*/
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/*
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GlobalMapTiles - part of Aggregate Map Tools
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Version 1.0
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Copyright (c) 2009 The Bivings Group
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All rights reserved.
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Author: John Bafford
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http://www.bivings.com/
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http://bafford.com/softare/aggregate-map-tools/
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Based on GDAL2Tiles / globalmaptiles.py
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Original python version Copyright (c) 2008 Klokan Petr Pridal. All rights reserved.
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http://www.klokan.cz/projects/gdal2tiles/
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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class GlobalMercator
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{
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var $tileSize;
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var $initialResolution;
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var $originShift;
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//Initialize the TMS Global Mercator pyramid
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function __construct($tileSize = 256)
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{
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$this->tileSize = $tileSize;
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$this->initialResolution = 2 * M_PI * 6378137 / $this->tileSize;
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# 156543.03392804062 for tileSize 256 Pixels
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$this->originShift = 2 * M_PI * 6378137 / 2.0;
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# 20037508.342789244
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}
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//Converts given lat/lon in WGS84 Datum to XY in Spherical Mercator EPSG:900913
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function LatLonToMeters($lat, $lon)
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{
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$mx = $lon * $this->originShift / 180.0;
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$my = log( tan((90 + $lat) * M_PI / 360.0 )) / (M_PI / 180.0);
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$my *= $this->originShift / 180.0;
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return array($mx, $my);
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}
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//Converts XY point from Spherical Mercator EPSG:900913 to lat/lon in WGS84 Datum
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function MetersToLatLon($mx, $my)
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{
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$lon = ($mx / $this->originShift) * 180.0;
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$lat = ($my / $this->originShift) * 180.0;
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$lat = 180 / M_PI * (2 * atan( exp( $lat * M_PI / 180.0)) - M_PI / 2.0);
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return array($lat, $lon);
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}
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//Converts pixel coordinates in given zoom level of pyramid to EPSG:900913
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function PixelsToMeters($px, $py, $zoom)
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{
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$res = $this->Resolution($zoom);
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$mx = $px * $res - $this->originShift;
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$my = $py * $res - $this->originShift;
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return array($mx, $my);
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}
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//Converts EPSG:900913 to pyramid pixel coordinates in given zoom level
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function MetersToPixels($mx, $my, $zoom)
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{
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$res = $this->Resolution( $zoom );
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$px = ($mx + $this->originShift) / $res;
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$py = ($my + $this->originShift) / $res;
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return array($px, $py);
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}
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//Returns a tile covering region in given pixel coordinates
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function PixelsToTile($px, $py)
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{
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$tx = ceil( $px / $this->tileSize ) - 1;
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$ty = ceil( $py / $this->tileSize ) - 1;
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return array($tx, $ty);
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}
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//Returns tile for given mercator coordinates
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function MetersToTile($mx, $my, $zoom)
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{
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list($px, $py) = $this->MetersToPixels($mx, $my, $zoom);
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return $this->PixelsToTile($px, $py);
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}
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//Returns bounds of the given tile in EPSG:900913 coordinates
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function TileBounds($tx, $ty, $zoom)
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{
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list($minx, $miny) = $this->PixelsToMeters( $tx*$this->tileSize, $ty*$this->tileSize, $zoom );
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list($maxx, $maxy) = $this->PixelsToMeters( ($tx+1)*$this->tileSize, ($ty+1)*$this->tileSize, $zoom );
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return array($minx, $miny, $maxx, $maxy);
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}
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//Returns bounds of the given tile in latutude/longitude using WGS84 datum
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function TileLatLonBounds($tx, $ty, $zoom)
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{
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$bounds = $this->TileBounds($tx, $ty, $zoom);
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list($minLat, $minLon) = $this->MetersToLatLon($bounds[0], $bounds[1]);
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list($maxLat, $maxLon) = $this->MetersToLatLon($bounds[2], $bounds[3]);
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return array($minLat, $minLon, $maxLat, $maxLon);
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}
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//Resolution (meters/pixel) for given zoom level (measured at Equator)
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function Resolution($zoom)
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{
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return $this->initialResolution / (1 << $zoom);
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}
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}
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$mercator = new GlobalMercator();
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?>
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